更多"When checking the liquid level in a"的相关试题:
[单项选择]If in doubt as to the true water level when a boiler is being oil-fired, you should （）.
A. take no measures
B. extinguish the fire as soon as possible
C. feed water to the boiler
D. open the blow down valve
[单项选择]A level gauge for a tank is to （）.
A. give the pressure
B. give the contents
C. give the shape of the tank
D. give the accuracy level
[单项选择]When inspecting a tank barge to see that it has all the required fire extinguishers and other safety items aboard，which of the following is the best source for determining what is required? （）
A. The supervisor in charge of the dock to which the barge is tied up
B. Part 38 of the Rules and Regulations for Tank Vessels
C. The Certificate of Inspection of the barge
D. The local fire marshal
[单项选择]If the overflow tank high-level alarm sounds while the fuel oil tanks are being topped off, the engineer should （）.
A. close the static leg filling valve
B. close the overflow tank falling valve
C. reduce the fuel oil pumping rate
D. stop the fuel oil pumping operation
[单项选择]If the low level alarm of the diesel fuel day tank fails to function, you can expect trouble from（）
A. overheated injection pumps
B. water condensed in the cylinders
C. fuel dilution of the lube oil
D. air in the fuel system
[单项选择]If you are bunkering and you close off one tank in the line of tanks being filled，the rate of flow to other open tanks on the same line will（）.
A. increase
B. decrease
C. stop
D. remain constant
[单项选择]When should you conduct a visual inspection of your towline? （）
A. Whenever its serviceability is in doubt
B. In accordance with the manufacturer's recommendation
C. At least once a month
D. All of the above
[单项选择]Movement of liquid in a tank when a vessel inclines causes an increase in（）.
A. righting arm
B. metacentric height
C. height of the uncorrected KG
D. natural rolling period
[单项选择]How should cargo tank hatches be protected when the ullage opening is open and the tank NOT gas free?（）.
A. With gooseneck vents
B. With warning signs
C. With flame screens
D. With pressure-vacuum relief valves
[单项选择]When checking the oxygen content of the cargo tanks prior to loading cargoes requiring vapor recovery，the atmosphere must be sampled（）.
A. one meter from the tank bottom and one meter below the tank top
B. one half the ullage of the tank and one meter below the tank top
C. one half the ullage of the tank and one meter above the tank bottom
D. at three meter intervals from the tank top
[单项选择]Accidental escape of oil out of a tank when it gets too full because pumping was not stopped in time defines（）.
A. overloading
B. over discharging
C. overflow
D. overtaking
[单项选择]ACCIDENTAL ESCAPE OF OIL OUT OF A TANK WHEN IT GETS TOO FULL BECAUSE PUMPING WAS NOT STOPPED IN TIME defines（）.
A. Overloading
B. Over discharging
C. Overflow
D. Overtaking
[单项选择]When liquid is free to move transversely in a tank，the effect is called（）.
A. free communication
B. free density
C. free surface
D. negative GM
